Linux is not just an OS It is your foundation for real troubleshooting and automation Here are commands I still use all the time And how they help when things break 📂 ls — list files 🚶cd — move between folders 🗺️ pwd — see where you are 📄 touch — create empty files 📁 mkdir — make new directories 🗑️ rm — delete old logs and junk 📦 cp — copy files safely 🚚 mv — move or rename files 🐱 cat — read configs fast 🔍 grep — search logs for errors 🔐 chmod — fix permissions 🦸 sudo — run as root when you must 📊 ps — check what is running 📈 top — monitor CPU and memory live 📊 df — check disk space 🌐 ifconfig / ip addr — view network settings 🏓 ping — test connectivity 🔐 ssh — connect to remote servers 📦 tar — compress backups 📖 man — read the manual when stuck 🧩 𝗖𝗼𝗺𝗯𝗶𝗻𝗲 𝘁𝗵𝗲𝗺 𝘁𝗼𝗼 ps aux | grep nginx — find processes tar czf backup.tar.gz /etc && scp backup.tar.gz server — quick backup and copy Save these and you will script faster Troubleshoot production with confidence And stay calm when things go sideways at 3am 🐧 What is your most used Linux command? Share it below 👇